Incandescent mantle support



A. G. IMBER INCANDESCENT MANTLE SUPPORT July 24, 1956 2 Sheets-Sheet 1 Filed NOV. 20, 1952 Inventor AZAPLO Q/PfQO/PV/MWK mr/k July 4, 1956 A. G. IMBER INCANDESCENT MANTLE SUPPORT 2 Sheets-Sheet 2 Filed Nov. 20, 1952 In ven tor nznaw qlerwxy/lvape 2,755,649 Patented July 24, 1956 INCANDESCENT MANTLE SUPPORT Alfred Gregory Imber, Greenford, England, assignor to Aladdin Industries Limited, Greenford, England, a corporation of Great Britain Application November 20, 1952, Serial No. 321,683

4 Claims. (Cl. 67-38) This invention relates to upright incandescent mantles and to the kind which, with a supporting element or elements, constitutes a unitary article capable of being mounted as such above a burner of the blue flame annular wick type.

in the course of the development of incandescent mantle fittings of the general character above described, a metal ring forming the base of the fitting has been constructed to co-operate with, or constitute a complementary component of the burner cone which is arranged concentrically in relation to the wick and wick tubes to form an annular chamber or space through which air ascends to mix with the vaporised fuel and form a blue flame above the upper end of the wick.

The object of the present invention is to provide an improved form of unitary mantle fitting wherein the basal metal ring is simplified in construction, cheapened in manufacture and formed to be adaptable to burners of varying types.

According to the invention an incandescent mantle fitting includes a metal ring from the peripheral portion of which the mantle is supported and characterised by a substantially vertical annular inner portion adapted to co-operate with the inner edge of a burner cone for the purpose of locating the mantle fitting centrally with respect to the said burner cone.

According to a preferred form of the invention an incandescent mantle fitting consists of a unitary article comprising a mantle sustaining support and a ring connected thereto the said ring being characterised in that its inner portion is formed as an annular trough and which terminates on its inner edge in an annular shoulder from which depends a substantially vertical wall.

According to another form of the invention an incandescent mantle fitting consists of a metal ring from the peripheral portion of which the mantle is supported and is characterised in that the inner peripheral portion of the ring is formed to engage within the inner edge of a burner cone and in that the outer peripheral portion of the ring is formed to engage a support situated externally of the burner cone in either case for the purpose of locating the mantle fitting centrally with respect to the said burner cone.

Reference will now be made to the accompanying drawings in which:

Fig. l is an elevation partly in section of a mantle fitting constructed according to the invention,

Fig. 2 is a plan of the fitting shown in Fig. 1,

Fig. 3 is a sectional elevation of a burner structure upon which the fitting shown in Figs. 1 and 2 is adapted to be mounted,

Fig. 4 is a plan of the burner structure shown in Fig. 3, and

Fig. is a sectional elevation of another form of burner structure to which the fitting shown in Figs. 1 and 2 is applicable.

Referring first to Figs. 1 and 2, the incandescent mantle fitting includes a basal metal ring whose peripheral portion 1 lies in a horizontal plane and is formed or provided at diametrically opposed points with projecting lugs 2 which have means for supporting the lower ends of the upright portions 3 of a wire arch or loop from the centre 4 of the top of which a mantle 5 is suspended. The inner portion of the metal ring is depressed to form an annular vertical wall 6 which constitutes the outer wall of an annular trough whose inner wall 8 is inclined upwards to form a shoulder 15 which terminates in a substantially vertical annular inner wall 9. The base of the trough is provided with a ring of perforations 7.

The ring as above described can be formed by a single pressing operation from a sheet metal blank and the trough 6-8 may serve to receive the lower edge of the mantle skirt whose length is liable to vary slightly during the course of manufacture. As a safeguard against displacement of the mantle a Wire ring 10 is provided which is retained in position by forming it at diametrically opposed points with loops 11 engaged by hook portions 12 projecting upwardly from the lugs 2 which are made of sufiicient extent to receive the loops 11 slightly to one side of the mantle support 3.

To mount a mantle fitting constructed as above described upon a burner having the form shown in Figs. 3 and 4 the annular Wall 9 is caused to enter within a similarly shaped wall 13 forming the upper termination of the burner cone 14, the shoulder 15 immediately above the annular wall 9 of the mantle fitting seating upon a similar annular shoulder 16 on the burner cone. In this manner the mantle fitting is located vertically at the correct height in relation to the upper end of the outer wick tube. The dimensions of the two co-operating annular walls 9 and 13 are so calculated that the one is an easy fit within the other and the mantle fitting as a unit is thereby retained in the correct central position against all but intentional displacement. To provide a positive means for locking the mantle fitting in position on the burner cone, the inner annular wall 9 is formed or provided with small projections 17 on its external surface which are arranged so that when the fitting is being operatively installed these projections 17 enter slots 18 formed in the shoulder 16 on the burner cone, such slots being contiguous with inclined portions 19 of the wall 13 so that, after a mantle fitting has been mounted as described, a partial rotary movement is imparted to it to cause the projections 17 to move into engagement with the inclined edges 19 and lock the mantle fitting in its operative position.

In the construction above described the area of contact between the basal ring'of the mantle fitting and the burner cone is relatively small being confined to the two annular walls 9 and 13. As the remaining portions of the trough 6-8 and the periphery 1 of the ring project outwards away from the burner cone they are cooled by the air ascending externally of the fitting and enable heat to be conducted away from the area of contact of the walls 9 and 13.

Mantle fittings constructed according to the invention are capable of application to burners of the known kind designed to support a mantle fitting independently of the burner cone. Such a burner is illustrated in Fig. 5 wherein 23 indicates the burner cone and 24 indicates a perforated wall or basket which surrounds the burner cone in concentric relation thereto. The peripheral portion 1 of the basal ring of the mantle fitting shown in Figs. 1 and 2 is also formed with notches 20 adapted to pass over tongues 21 projecting upwardly from an internally directed flange 22 on the member 24. Partial rotary movement of the mantle fitting thereafter moves the notches 20 out of coincidence with the tongues 21 and causes the peripheral flange 1 of the ring to pass beneath the tongues 21 thereby establishing an interlock between the two components.

Although the mantle fitting above described is primarily designed for application to the simplified burnerconstruo tion shown in Figs. 3 and 4 it also possesses the advantage that it can be applied to existing burners of the general character described with reference to Fig. 5. The improved mantle fitting is thus made applicable to a large number of incandescent mantle lamps at present in use.

What I claim is:

1. An incandescent mantle s PPort comprising a metal ring from the peripheral portion of whieh the mantle is supported and having a substantially vertical annular inner wall adapted to engage the inner edge of a burner cone with a sliding fit for the purpose of locating and locking the mantle support centrally with respect to the said burner cone, said vertical wall having raised conformations adapted to mate with cooperating flanged portions disposed centrally of the burner cone to lock said support centrally of said cone.

2. An incandescent mantle support according to claim 1 wherein the mantle supporting ring comprises an outer annular horizontal portion, a vertical portion depending from the inner edge of said horizontal portion, an annular shoulder formed by a portion inclined upwardly from the base of said vertical portion and wherein said substantially vertical annular inner Wall portion depends from said shoulder.

3. An incandescent mantle support comprising a metal ring in the form of an annular trough having an outer vertical wall, an inner inclined wall forming an annular shoulder and a substantially vertical inner wall depending from said shoulder, a flange projecting outwardly from the head of the said outer vertical wall and having means to support the upright portions of a mantle sustaining loop, means formed on the said inner vertical Wall to interlock with conformations defined inside the head of a burner cone and slots formed in the periphery of said flange to enable said flange to be interlocked with a support external to the burner cone.

4. An incandescent mantle support-comprising a metal ring in the form of a unitary structure presenting a pcripheral portion supporting the lower ends of a wire loop from which an incandescent mantle is suspended, said ring defining a substantially vertical annular inner Wall disposed for vertical sliding engagement with the inner periphery of a burner cone and capable of accurately centralizing said ring in said .cone.

References Cited in the file of this patent UNITED STATES PATENTS 

